My partner and I found ourselves climbing Reynolds peak via its northern ridge (from Dog Lake). The avalanche ripped from a northeastern pocket on the ridge line immediately north of an aspen glade which ran from the ridge to the bottom of the apron. When we investigated, we began to appreciate the slide's severity. Reaching a depth of ~4ft in locations and stretching for ~300 ft, it was immense. We noted that the avalanche failed on the PWL and propagated for at least a third of Reynolds' east face. After wrapping around towards the south and then back towards dog lake, we observed that the avalanche debris cascaded until ~8900 ft, removing a few small trees and branches. On the ridge, there was a western/southwestern wind which contributed to small cornices around the east face. However, my partner and I struggled to produce any collapses. We found no evidence of skiers or animals, thus it is likely that the avalanche was caused by the heavy snowfall/naturally, which was our first assumption. The visibility was rather poor today, and my phone camera was similar to if I had dropped it in a bucket of water, so apologies in advance if the pictures are unhelpful. For those of you touring in Mill D, this slide should be visible for those that hike beyond the reaches of Tom's Hill. Best of luck this weekend.

Comments by another party - Evan Sparling - "Judging by the accumulated snow on top of the bed surface, I suspect it ran overnight or during the early morning when this area received very heavy snow or possibly rain. it was likely triggered naturally but could have been a remote trigger from a skier on the skin track on the ridge."